1. PHYSICS

    The space probe Deep Space 1 was launched on October 24, 1998. Its mass was 474 kg. The goal of the mission was to test a new kind of engine called an ion propulsion drive. This engine generated only a weak thrust, but it could do so over long periods of

    asked by Anonymous on October 5, 2015
  2. College Physics

    The space probe Deep Space 1 was launched on October 24, 1998. Its mass was 474 kg. The goal of the mission was to test a new kind of engine called an ion propulsion drive. This engine generated only a weak thrust, but it could do so over long periods of

    asked by Tyler on January 11, 2017
  3. physics

    The space probe Deep Space I was launched on October 24, 1998. Its mass was 474 kg. The goal of the mission was to test a new kind of engine called an ion propulsion drive. This engine generated only a weak thrust, but it could do so over long periods of

    asked by anonymous on December 4, 2010
  4. chemistry

    A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 10.23

    asked by sara on April 10, 2013
  5. Chemistry

    A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 10.23

    asked by Jematormal91 on March 23, 2012
  6. Chemistry

    A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 10.10

    asked by JayJay on May 30, 2013
  7. physics

    A power boat of mass 460 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume -- contrary to fact -- that the resistive force due to

    asked by kp on October 2, 2009
  8. Physics

    A 10.2 kg weather rocket generates a thrust of 200N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 500N/m, is anchored to the ground. a) Initially before the engine is ignited,

    asked by Alexandra on November 25, 2010
  9. English

    I left out the following sentences. Thank you very much. 1) His dictionary definition of a horse underlines how Mr. Gradgrind has choked his Bitzer's imagination. 2) The black of the soot (can soot be replaced by ash and smoke?). 3) Dickens compares the

    asked by Matthew on March 28, 2012
  10. general physics

    The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 6.76 m3. What is the weight of the heaviest bear that the ice can support without sinking completely

    asked by please help with these practice problems on July 20, 2013
  11. physics

    The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 4.41 m3. What is the weight of the heaviest bear that the ice can support without sinking completely

    asked by hannah on February 9, 2012
  12. physics

    The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 3.25 m3. What is the weight of the heaviest bear that the ice can support without sinking completely

    asked by Lucy on November 1, 2012
  13. PHYSICS

    The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 5.70 m3. What is the weight of the heaviest bear that the ice can support without sinking completely

    asked by Anonymous on November 16, 2015
  14. Solid Mensuration

    a hemispherical container contains water to a depth of 10cm. If the volume of the water inside the container is 5000pi/3cm^3,find the diameter of the vessel. (i already tried using V=2/3 pi r^3 since it is a hemisphere but my answer and the answer of the

    asked by Yell on March 25, 2015
  15. physics

    The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 5.34 m3. What is the weight of the heaviest bear that the ice can support without sinking completely

    asked by Anonymous on November 17, 2012
  16. physics

    A 11.6 kg weather rocket generates a thrust of 215.0 N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 399.0 N/m, is anchored to the ground. Initially, before the engine is

    asked by Anonymous on November 1, 2009
  17. Chemistry

    Propane gas (C3H8) burns completely in the presence of oxygen gas (O2) to yield carbon dioxide gas (CO2) and water vapor (H2O). Write a balanced equation for this reaction. Assuming that all volume measurements occur at the same temperature and pressure,

    asked by X on February 20, 2015
  18. Chemistry

    Propane gas (C3H8) burns completely in the presence of oxygen gas (O2) to yield carbon dioxide gas (CO2) and water vapor (H2O). Write a balanced equation for this reaction. Assuming that all volume measurements occur at the same temperature and pressure,

    asked by O on March 6, 2015
  19. CHEM

    how do I work this question out?: 50.00g of NaCl are dissolved in water to give a solution that contains 2.500% NaCl by mass. The density of the solution is 1.030g/mL. The volume of the solution is: a)941.8mL; b)1.942L; c)2.500L; and, d)50.0mL. I know the

    asked by K on December 11, 2006
  20. Math

    Suppose that we have three engines, which we turn on at time 0. Each engine will eventually fail, and we model each engine"s lifetime as exponentially distributed with parameter λ. The lifetimes of different engines are independent. One of the engines

    asked by Maths: Probability Distrubution on November 30, 2018
  21. General Chemistry

    What effect would tap water have on the volume of EDTA required for titration?

    asked by Kasia on October 19, 2012
  22. chemistry

    Why is it important to make sure that the volume of water and the starting temperature are the same in each trial ?

    asked by danny on October 28, 2014
  23. physics

    if an iron cube of volume 400cm3 is immersed in water,the upthrust will be?

    asked by aisha on March 19, 2015
  24. science

    How would I calculate the true volume? is it the mass/density(temperature of water)?

    asked by Boborto on September 19, 2018
  25. Science

    How does water displacement work when finding the volume of an irregular object?

    asked by Nikki on October 9, 2013
  26. Physics

    An object has a volume of 4.0m^3 and weighs 40,000 Newtons. What will be its weight in water?

    asked by Lucy on January 7, 2015
  27. Science

    What is the volume of the rock if the water level rises to the 120 ML mark

    asked by Fidel on November 29, 2016
  28. chemistry

    What volume of oxygen is consumed when 9g of water is formed when butane is burnt?

    asked by Oliver on March 10, 2013
  29. Org. Chem.

    Is there a correlation between the values of the distribution coefficients and the polarities of the three compounds? Explain. Place 0.050 g of one of the solids (benzoic acid, succinic acid, or sodium benzoate) in a vial and add 2 mL of methylene chloride

    asked by CM on September 22, 2009
  30. Chemistry

    Which of the following is NOT TRUE? A. The blank for this experiment must have 100 % transmittance if placed in a spectrometer (Spec 20). B. The volume required to titrate the blank is subtracted from the volume used to titrate the analyte solution to give

    asked by Adam on April 28, 2008
  31. Hillbrow s.s.s

    question1 multiple choice.. 1.1.1 The only type of soil water that available to plants is... A gravitation water B hygroscopic water C capillary water D swell water

    asked by mfayise sinovuyo on October 23, 2015
  32. chemistry

    Given: Ti=298K V=.005 L Pt=1 atm P H20 vapor= .0313atm P air= .9687 atm you increase the temperature to 338K; the total pressure remains 1 atm, but the volume increases. Determine the volume at the new temperature (assume water vapor reaches equilibrium at

    asked by Kellie on July 6, 2012
  33. Earth science

    A sphere was dropped into water in a graduated cylinder as shown in the following diagram.The water level rose th the new level shown .What is the volume of the sphere

    asked by Anonymous on September 29, 2014
  34. chemistry

    how to find the pressure exerted by the hydrogen alone? and the volume of dry hydrogen at SATP? i have room temperature=23C room pressure =101.62kPa volume of h2 gas & H2O vapour collected =43.2ml temperature of water = 23C length of Mg ribbon = 3.00cm

    asked by Riana on January 22, 2013
  35. Chemistry PLEASE HELP!!!

    'A buffer is prepared by mixing a 100.omL of a 0.100 M NH3 solution with a 0.200M solution of NH4CL solution and making the total volume up to 1.000L of water. What is the volume of NH4Cl solution required to achieve a buffer at ph=9.5? Ka of

    asked by jemima on December 11, 2012
  36. General Science

    Surface water is important because it? 1. furnishes plants with water 2. provides a supply of drinking water 3. contributes to the water cycle 4. supplies water to rivers during dry periods

    asked by Anonymous on May 13, 2009
  37. physics

    an aluminum object has a mass of 27 kg & a density of 2700 kg/m^3. it is hung from a rope under the surface of water (density=1000 kg/m^3). what is the volume of the object and the tension in the string, while the object hangs from it & also under the

    asked by john on March 16, 2010
  38. math

    The portion of a swimming pool that is below the full water line measures 12 feet by 30 feet by 6 feet deep. what is the volume of the water in the swimming pool when it is fully, expressed in cubic yards? (1 cu yd= 27 cu ft )

    asked by Anonymous on March 24, 2012
  39. chemistry

    cold water mass of calimeter+ water: 68.66g mass of calimeter: 19.19g mass of water: 49.47g final temperature of water: 39.1C initial temperature of water: 25.5C delta(T) of water: 13.6C hot water mass of calimeter+ water: 79.55g mass of calimeter: 20.61g

    asked by Yuli on December 1, 2011
  40. Calculus - check answers

    I'd appreciate corrections for the ones I get wrong. :) Thanks! 6. A point on a damped spring has motion given by s(t)=2e^(-1.5t) s in2(pi)t, where s is measured in centimeters and t is measured in seconds. Choose which of these is the graph for the

    asked by Lata on December 14, 2018
  41. SCIENCE HELP

    CAN SOMEONE CHECK THESE!! 1. Which of the following is a reason why a person might want to wear snowshoes if walking a distance in deep snow? (1 point) snowshoes spread the person’s weight out snowshoes reduce the amount of pressure on a given spot

    asked by gabby on May 28, 2016
  42. chemistry

    (a) A person drinks four glasses of cold water (3.0°C) every day. The volume of each glass is 2.5x10^2 mL. How much heat (in kJ) does the body have to supply to raise the temperature of the water to 37°C, the body temperature? (b) How much heat would

    asked by Amber on November 14, 2011
  43. Algebra

    Two varieties of herbal tea, one cost $4.00 per kilogram other cost $5.00 per kilogram. How many kilograms of each type are needed to make 20kg of a blend worth $4.60 per kilogram?

    asked by TinaG on May 25, 2010
  44. math

    a company bought 50lb of kona beans at $34.95 per lb. and plans to mix these with colombian beans at $7.99 per lb. wholesale. If they want the blend to be $11.95 per lb, how many lbs of colombian beans should they buy?

    asked by Shelly on April 11, 2011
  45. Science

    How can I describe the following things about water in sketches or drawings? please give me ideas 1.High heat capacity 2.High heat of vaporization 3.Water is a solvent 4.Water molecules are cohesive and adhesive 5. Frozen water is less dense than liquid

    asked by Kylie on February 10, 2016
  46. Biology /science

    How can I describe the following things about water in sketches or drawings? please give me ideas 1.High heat capacity 2.High heat of vaporization 3.Water is a solvent 4.Water molecules are cohesive and adhesive 5. Frozen water is less dense than liquid

    asked by Kylie on February 10, 2016
  47. Chem

    I have a problem, the density of the metal = mass (2) - mass (1) over Volume (2) - Volume (1) = My first mass and volume are 15.098g and 5.5 mL. the second mass and volume are 11.3235g and 4.0 mL. I got 9.04g/mL as my answer if this isn’t right can you

    asked by Jackson on September 28, 2010
  48. chemistry

    146 mL of wet H2 gas is collected over water at 29.0 degrees celsius and room pressure of 750 torr. give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry H2 at room conditions and the

    asked by melanie on December 9, 2010
  49. Chemistry

    Heyy, okay I have this question about chemistry and its driving me nuts. It feels like I am so close but am just missing something. The question is: A vessel of 6.84 L in volume contains 3.61 L of pure water at 25°C. A partial pressure of 3.67 atm of CO2

    asked by Tracy on February 4, 2007
  50. science (density)

    1) mass=100g, volume=10ml,density= 2) volume=7ml, mass=70g, density= 3) mass=50g, volume=10cm3, density= 4) volume=30cm3,mas=90g,density= 5) mass=120,volume=6ml,density= Thanks everyone i apresheate your help.

    asked by Carly on October 9, 2008
  51. science (density)

    1) mass=100g, volume=10ml,density= 2) volume=7ml, mass=70g, density= 3) mass=50g, volume=10cm3, density= 4) volume=30cm3,mas=90g,density= 5) mass=120,volume=6ml,density= Thanks everyone i apresheate your help.

    asked by Carly on October 9, 2008
  52. Chemistry

    1. Calculate the acetylsalicylic acid concentration (in mg/mL) of aspirin solution #2 in the Procedure section. Assume that 300 mg of acetylsalicylic acid has been weighed out. 2.3. (3 pts) Calculate the acetylsalicylic acid concentrations (in mg/mL) of

    asked by Cassie on April 10, 2012
  53. Probability - 2

    Suppose that we have three engines, which we turn on at time 0. Each engine will eventually fail, and we model each engine"s lifetime as exponentially distributed with parameter λ. The lifetimes of different engines are independent. One of the engines

    asked by Noonan on November 29, 2018
  54. probability

    Suppose that we have three engines, which we turn on at time 0. Each engine will eventually fail, and we model each engine"s lifetime as exponentially distributed with parameter λ. The lifetimes of different engines are independent. One of the engines

    asked by Fay on November 28, 2018
  55. physics

    please check these; a container of gas is at pressure of 3.7*10^3 Pa. How much work is done by the gas if its volume expands by 1.6 m. 5.92 * 10^5 A 0.10 kg piece of copper at an initial temperature of 95degC is dropped into 0.20 kg of water contained in a

    asked by y912f on February 17, 2009
  56. physics

    please check these; a container of gas is at pressure of 3.7*10^3 Pa. How much work is done by the gas if its volume expands by 1.6 m. 5.92 * 10^5 A 0.10 kg piece of copper at an initial temperature of 95degC is dropped into 0.20 kg of water contained in a

    asked by y912f on February 18, 2009
  57. Chemistry- Drbob-help

    I have placed the answer I got please help. A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 870mL

    asked by Paul on February 10, 2011
  58. chemistry

    Bill finds an unusual object and wishes to calculate it's density. He discovers a problem of accurately weighing it, because it won't stay on the weighing pan. To solve this he adds the object to a beaker containing 190 mL of distilled water and finds the

    asked by abbey on September 8, 2009
  59. Chemistry

    A 0.464 gram sample of a metal, M, reacts completely with sulfuric acid according to: M(s) +H2SO4(aq)=MSO4(aq)+H2(g) A volume of 211 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level.

    asked by Raul on March 9, 2013
  60. chemistry

    A CHM 111 student recorded the mass of a piece of dry lead metal as 23.7412 g. He obtained a graduated cylinder and recorded an initial water volume of 25.0 mL; upon addition of the metal, the water level rose to 27.1 mL. Calculate the density of lead in

    asked by dani on January 25, 2015
  61. Chemistry

    A 0.250g smaple of magnesium-aluminum alloy dissolves completely in an excess of HCl(aq). When the liberated H2(g) is collected over water at 29C at 752torr, the volume is found to be 297mL. The vapor pressure of water at 29C is 30.0torr. What is the mass

    asked by Cynthia on October 10, 2011
  62. chemistry

    Bottle A has a volume of 1.2 L, When Filled with sugar water the bottle has a total mass of 5.0 pounds. If the empty bottle has a mass of 800 grams. determine the density of the sugar water in g/mL.

    asked by Yoyo on August 17, 2011
  63. physics

    A board that is 20 cm wide, 5 cm thick, and 3 m long has a density of 350 kg/m^3. The board is floating partially submerged in water do density 100 kg/m^3. What fraction of the volume of the board is floating above water?;

    asked by David on July 14, 2013
  64. Physics

    Hey guys - this problem is pretty tough for me...any help? Don't know what to do.... In seawater, a life preserver with a volume of 4.00×10^−2 m^3 will support a 76.0 kg person (average density 980 kg/m^3), with 20.0 % of the person's volume above water

    asked by Randi on January 29, 2010
  65. algebra

    coffee shop plans to mix grage a cogge costing $9.50/lb and grade b coffee costing &7 /lb to yield a 20lb blen costing $8.50/lb. how many pounds of each to make the blend? a=b=20 9.5a+7b=170

    asked by lisa on December 12, 2015
  66. Physics

    The engine is in the back of the train it is pushing. The passengers were in the car closest to the engine. There were five cars in total. The front car had one person in it. When he noticed a semi truck trailer sitting on the track he pulled the emergency

    asked by Dakota on July 4, 2011
  67. Heat!!!

    Can you please check my answers. My teacher gave me a list of 200 questions to study, but I lost the answer sheet. Can you please help me with these 23 Thanks 1. A silver bar 0.125 meter long is subjected to a temperature change from 200°C to 100°C. What

    asked by Brooke on July 5, 2011
  68. Chemistry

    Hi, i'm really desperate! could anyone please help me with this question, I'm stumped. 'A buffer is prepared by mixing a 100.omL of a 0.100 M NH3 solution with a 0.200M solution of NH4CL solution and making the total volume up to 1.000L of water. What is

    asked by emily on December 11, 2012
  69. chemistry

    A solution is prepared by dissolving 20.2 {\rm mL} of methanol ({\rm{CH}}_3 {\rm{OH}}) in 100.0 {\rm mL} of water at 25 ^\circ {\rm C}. The final volume of the solution is 118 {\rm mL}. The densities of methanol and water at this temperature are 0.782 {\rm

    asked by aa on July 14, 2012
  70. physics

    A student is thrown in a lake by his teacher, the student has a mass of 70 kg and a volume of 80,000 cm^3. Would the student sink or float? What is the net force on the student? What is the density of an object that has a mass of 2000 kg and a volume of

    asked by John on July 14, 2015
  71. Calculus

    The tank shown is full of water. Given that water weighs 62.5 lb/ft3, find the work required to pump the water out of the tank. The tank shown is a hemisphere with r = 5 ft. The water is to be pumped out at the top. First I solved for ri, ri / (5 - xi) = 5

    asked by COFFEE on June 24, 2007
  72. math

    East Battle Lake in Minnesota covers an area of about 1950 acres or 8.5X10^7 square feet and its average depth is about 3.2x10^1 feet. a. Estimate the cubic feet of water in the lake. (hint: Volume=area x average depth.) b. One cubic foot of water equals

    asked by nikkisopretti on February 4, 2013
  73. Physics, help!

    A heat engine absorbs 126 kcal of heat and exhausts 77 kcal of heat in each cycle. Calculate the efficiency (as a percentage) An ideal gas heat engine operates in a Carnot Cycle between temperatures of 266 and 115°C. It absorbs 4250 cal per cycle at

    asked by Sierra on January 18, 2013
  74. physics

    The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. As shown is the figure, a polar bear climbs onto a piece of ice, which has a volume of 5.75 m3, and is floating in sea water. a) What is the mass of the piece of ice? b) What is

    asked by Chris on March 9, 2013
  75. chemistry

    Acetylene(C2H2), an important fuel in welding, is produced in the laboratory when calcium carbide (CaC2) reacts with water: CaC2(s) + 2H20(l) → C2H2(g) + Ca(OH)2(aq) For a sample of acetylene collected over water, total gas pressure (adjusted to

    asked by vishal on January 1, 2015
  76. Social Studies 2

    How is acting like water an example of following the teachings of Daoism? A. because although water is clear, it can be colored different colors B. because over time, water is stronger than rock C. because water is found all over the earth D. because water

    asked by Hi Sisters on October 24, 2018
  77. Chemistry

    Assume that 5.00 grams of zinc react with excess HCl according to the following equation: Zn + 2HCl = ZnCl2 + H2 The hydrogen was collected over water at 20.0C and the prssure of the atmosphere is 751 mmHg. The pressure of the water vapor at 20C is 17.5

    asked by Michael on January 17, 2017
  78. physics

    An object floats on water with 84% of its volume below the surface. The same object when placed in another liquid floats on that liquid with 74% of its volume below the surface. Determine the density of the unknown fluid

    asked by ayesha on April 16, 2014
  79. Physics

    A block of wood with volume V floats in water with 0.68V submerged. In oil the block floats with 0.86V of its volume submerged. What's the density of the wood?

    asked by Ray on November 17, 2009
  80. Science

    how many ml of water are present in 250ml of a 15% by volume oguous hydrocloric acid solution?

    asked by Araceli on July 7, 2014
  81. science

    A substance has a mass of 12.5 grams and a volume of 9.8 ml.Will the object sink or float in water?

    asked by marshall on March 1, 2013
  82. phy

    A piece of plastic barely floats in water. If it has a mass of 20g, what is its volume?

    asked by christ on January 25, 2013
  83. Chemistry

    Calculate the volume of water, in milliliters, that would be displaced by a piece of gold weighing 18.2g.

    asked by Anne on September 13, 2012
  84. Chemistry

    If you have 1 sack of cotton (which is expected to float on water) and were asked to measure the volume, what will you do?

    asked by Kian on July 30, 2011
  85. chemistry

    Suppose this block is dropped into 25.0ml of water. What will be the new volume reading? Help me please . I dot get it!!

    asked by lala on September 23, 2011
  86. chemistry

    calculate the volume of water in mL needed to make 75% solution containing 50g of CaCl2

    asked by Quinne on March 16, 2011
  87. physics

    A plastic bobber just barely floats in water. If it weighs 2N in the air, what is its volume

    asked by mike on June 25, 2010
  88. hydraulics

    Arock weighs 1000N in air and 609N in water.Find its volume.

    asked by Melaku on December 14, 2016
  89. science

    if 10 mol of hydrogen reacted with oxygen what volume of liquid water could be produced

    asked by jo on September 22, 2009
  90. Chemistry

    Calculate the volume of water, in milliliters, that would be displaced by a piece of gold weighing 18.2g.

    asked by Anne on September 13, 2012
  91. chemistry

    if 10 mol of hydrogen reacted with oxygen, what volume of liquid water could be produced?

    asked by jo on September 22, 2009
  92. Chemistry

    Which measuring device in the Laboratory would be most accurately measure the volume of 25.0 grams of water?

    asked by Coleen on August 6, 2011
  93. math

    Find the volume of water in a fish tank that is 4 m long, 1.7 m wide, and 54 cm deep?

    asked by pam on February 7, 2011
  94. Chemistry

    Calculate the volume of water, in milliliters, that would be displaced by a piece of gold weighing 18.2g.

    asked by Anne on September 13, 2012
  95. Chemistry

    How much corn syrup should be added to water to make 200 ml of a 10% by volume solution?

    asked by P on March 14, 2009
  96. chemistry

    in order to dilute 40.0 ml of .600 m hcl to .100 m, the volume of water that would need to be added would be?

    asked by Anonymous on March 26, 2012
  97. Chemistry

    If 26.4 L of H2 reacted with 13.2 L of O2 at STP, what is the volume of the gaseous water collected assuming that none of it condenses?

    asked by :) on December 12, 2011
  98. chemistry

    Determine the volume of H gas needed to react completely with 5.00 L of O to form water ?

    asked by Anonymous on April 21, 2010
  99. AP chemistry

    If 25.0g of water are decomposed at RTP how would you find the volume of hydrogen gas produced?

    asked by Lily on January 7, 2011
  100. science

    a solution made from 35 mL of ethanol and 65 mL of water produces by what percent concentration of volume

    asked by frances on September 26, 2012